12261620503 has 4 divisors (see below), whose sum is σ = 13376313288. Its totient is φ = 11146927720.

The previous prime is 12261620491. The next prime is 12261620507. The reversal of 12261620503 is 30502616221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12261620503 - 2⁹ = 12261619991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261620507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 557346376 + ... + 557346397.

It is an arithmetic number, because the mean of its divisors is an integer number (3344078322).

Almost surely, 2^12261620503 is an apocalyptic number.

12261620503 is a deficient number, since it is larger than the sum of its proper divisors (1114692785).

12261620503 is a wasteful number, since it uses less digits than its factorization.

12261620503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114692784.

The product of its (nonzero) digits is 4320, while the sum is 28.

The spelling of 12261620503 in words is "twelve billion, two hundred sixty-one million, six hundred twenty thousand, five hundred three".